ATE149690T1 - EXCITING CIRCUIT FOR BIOPROBE ELECTRODES - Google Patents

EXCITING CIRCUIT FOR BIOPROBE ELECTRODES

Info

Publication number
ATE149690T1
ATE149690T1 AT91903964T AT91903964T ATE149690T1 AT E149690 T1 ATE149690 T1 AT E149690T1 AT 91903964 T AT91903964 T AT 91903964T AT 91903964 T AT91903964 T AT 91903964T AT E149690 T1 ATE149690 T1 AT E149690T1
Authority
AT
Austria
Prior art keywords
circuit
operational amplifier
potential
apart contacts
electrode
Prior art date
Application number
AT91903964T
Other languages
German (de)
Inventor
Robert A Parks
Original Assignee
Boehringer Mannheim Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23790838&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE149690(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Boehringer Mannheim Corp filed Critical Boehringer Mannheim Corp
Application granted granted Critical
Publication of ATE149690T1 publication Critical patent/ATE149690T1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
    • G01N27/3271—Amperometric enzyme electrodes for analytes in body fluids, e.g. glucose in blood
    • G01N27/3273—Devices therefor, e.g. test element readers, circuitry

Abstract

A circuit is described for applying a potential to an electrode of a biosensing test cell, which electrode, when properly inserted in a female connector, is contacted by a pair spaced apart contacts. The circuit includes a source of excitation potential and an operational amplifier having one input connected to the source of excitation potential. A switching circuit is coupled between the operational amplifier and a first one of the spaced apart contacts, with the switch means exhibiting an impedance. A feedback circuit is connected between the second of the spaced-apart contacts and another input to the operational amplifier, to feed back a potential appearing at the second contact. The feedback is for the purpose of maintaining the output of the operational amplifier at a level which compensates for impedance losses in the swtiching circuit. The feedback circuit enables the output of the operational amplifier to be varied so that the potential applied to the electrode is equal to the source of excitation potential. A further circuit is connected to the feedback circuit for sensing when an open or high impedance state exists between the spaced-apart contacts.
AT91903964T 1989-12-15 1990-12-14 EXCITING CIRCUIT FOR BIOPROBE ELECTRODES ATE149690T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/451,108 US4999582A (en) 1989-12-15 1989-12-15 Biosensor electrode excitation circuit

Publications (1)

Publication Number Publication Date
ATE149690T1 true ATE149690T1 (en) 1997-03-15

Family

ID=23790838

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91903964T ATE149690T1 (en) 1989-12-15 1990-12-14 EXCITING CIRCUIT FOR BIOPROBE ELECTRODES

Country Status (8)

Country Link
US (1) US4999582A (en)
EP (1) EP0505504B1 (en)
JP (1) JP2708276B2 (en)
AT (1) ATE149690T1 (en)
CA (1) CA2068214C (en)
DE (1) DE69030104T2 (en)
ES (1) ES2100944T3 (en)
WO (1) WO1991009316A1 (en)

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Also Published As

Publication number Publication date
CA2068214A1 (en) 1991-06-16
EP0505504A1 (en) 1992-09-30
JP2708276B2 (en) 1998-02-04
WO1991009316A1 (en) 1991-06-27
DE69030104T2 (en) 1997-09-25
JPH05503158A (en) 1993-05-27
CA2068214C (en) 1998-12-01
US4999582A (en) 1991-03-12
EP0505504A4 (en) 1993-08-04
ES2100944T3 (en) 1997-07-01
DE69030104D1 (en) 1997-04-10
EP0505504B1 (en) 1997-03-05

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